Revert "lua-factory: port grl-euronews.lua to the new lua system"
Revert "lua-factory: port grl-euronews.lua to the new lua system"

This reverts commit 592bb1c7a5315e4f2582dad415e03e42f5a43cad.

But keeps grl.fetch callback as function instead of string

https://bugzilla.gnome.org/show_bug.cgi?id=763046

MikePetullo/grilo-plugins,MikePetullo/grilo-plugins,GNOME/grilo-plugins,jasuarez/grilo-plugins,MikePetullo/grilo-plugins,GNOME/grilo-plugins,grilofw/grilo-plugins,grilofw/grilo-plugins,jasuarez/grilo-plugins